package usb;

import java.io.Serializable;

public class TestUSB {

	public static void main(String[] args) {
		Object s = new String("ssss");
		if (s instanceof Serializable) {
			System.out.println("执行一些特殊操作！");
		}
		USB[] b = new USB[4];
		b[0] = new Mouse();

		for (int i = 0; i < b.length; i++) {
			System.out.println(b[i]);
		}
	}

}
